"Cool" isn't doing what your friends are doing. "Cool" is being confident in where you stand. Never apologize for liking what you like. In the immortal words of Taylor Swift, "Haters gonna hate, hate, hate." So you do you, dude.
Since experience is probably the most valuable thing to offer college freshmen (except for free food because free food always wins), here are some things I learned/wished I would have realized during my first semester of college.